Electric switch.



No. I775.052. PATENTED NOV. l5, 1904.

I. G. WATERMAN.

ELECTRIC SWITCH.

APPLICATION FILED .TAIL/31. 1903.

N0 MODEL.

n Ymmmwmmm jow j MM" formed play of the cup 9. The

To (LZZ whom, it may concern:

Patented November 15V, 1904.

i'sAAo e. WATERMAN, or

SANTA BARBARA, CALIFORNIA.

ELECTRIC swlToH.

SPECIFICATION forming part of Letters Patent No. 77 5,0152, dated November 15, 1904.

Application filed January 3l.,

Be it known that I, ISAAC G. WATERMAN,a citizen of the United States, residing at Santa Barbara, in the county of Santa Barbara and State of California, have invented certain new and useful Improvements in Electric Switches,

of which the following is a specification.

The present invention relates to electric switches.

This invention is designed as an improvement on the electric switch set forth in my Patent No. 732,477, dated June 30, 1903, and has for its object the provision of novel means for unlocking the switch-contact tumbler when the push-button is released and thereupon to .throw the switch-contact tumbler to off position, the purpose being to first make and then break the circuit.

Having the foregoing object in view, the invention consists of the improved features and novel combinations and adaptations of parts set forth in detail hereinafter and embodied in the appended claims.

In the accompanying drawings, Figure 1 is a plan with the casing in section; Fig. 2, a longitudinal sectionshowing the switch in off position; Fig. 3, aview like Fig. 2, showing the switch in on position; Fig. 4, a cross-'section of the push-button mechanism; Fig. 5, an enlarged detail of the locking lever, cam. and pawl.

There is a shell or casing 1 provided with a detachable face-plate 2, the operative parts of the switch being connected to the faceplate and contained within the shell. Secured to the face-plate is a cup 3, with which is a bifurcated frame 4. The cup is provided with slots 5-to receive the pins 6 on the push-button mechanism 7, which works in the cup, and the push-button is held projected by springs 8 bearing on the pins 6. Slidable in the push-button is a.cup-9, which is seated against a coil-spring 9" in the pushbutton. Pivoted to the cup is an actuatingfinger 9, having trunnions 11, slidable in slots l1' in the push-button, Fig. 4, which limit the nger 9 is adapted to cooperate with a notch l0 of the switchcontact tumbler 12, pivoted to the frame 4 by the pin 13and having the locking-notches 14 and 15, adapted to be engaged in alternation i by the locking-lever 16, which is pivoted to ears 17 on the bifurcated frame 4 and has the tail 18 positioned for engagement by the push-button mechanism.

The construction' of the parts heretofore described, with the exception of the bifurcated frame, is in 'all respects similar to the operating mechanism of the switch set forth in my Patent No. 732,477, dated June 30, 1903, and further description thereof is therefore deemed unnecessary.

In the present invention I provide contacts 19 and 20 on the ends of the frame members 4, and a contact-finger 21 is secured to the tumbler 12 and adapted to make contact with both contacts 19 and 20 simultaneously when the button is pushed in. The contacts are all suitably insu-lated.

Secured to and movable with the pushbutton. mechanism is a rod 22, slidable in a,

the shoulder 27 and act as an abutment for` the cam 24 to wipe against when the pushbutton is released and thereupon push the locking-lever aside and release the tumbler 12, which is then snapped to spring 28, coiled around the tumbler-pivot and connected to the tumbler and to the frame 4.

The operation is as follows: When the button is pushed, the finger 9 engages the'notch in the tumbler, putting spring 9" under compression. Afterward the push-button 7 engages the tail 18 and ,unlocks the tumbler, whereupon the spring 9" expands, projecting finger 9, which snaps the tumbler (in opposition to the retracting-spring 28 thereof) to'y cause the contact-linger 21 to engage the contacts 19 and 20, the camprojection riding past the pawl 26. On releasing the push-button the springs 8 return 'the push-buttodand linger, and the tumbler is Erst 'momentarily locked by the lever engaging the other notch thereof, after which the cam 24 engages the the 4off position by a ICO paw] 26 and by pressing it against the shoul- .der 27 disengages the lever from the tumbler, whereupon the spring Z8 snaps the tumbler back'to olf position, where it is held by the 'rengagement of the lever therewithafter the spring for actuatingsaid switch-contact memtrolled by the actuating member adapted to ber, of a locking member for locking the movable switch-contact member in both on and ofi' positions, an actuating member arranged to positively engage the movable switch-contact member and move it in opposition to the retracting-spring of said switchcontact member, a spring for snapping the movable switch'- contact member in opposition to its own i spring, and means controlled by the actuating member for releasing the locking memberfrom the movable switch-contact member in both the ad vanceand return movements of the actuating` member.

' 2. lny an electric switch, the combination with a movable switch-contact member, of a locking member for lockingthe switch-contact member in both on and off positions, an actuating member arranged to positively engage the switch-contact member, a retractingspring for actuating the switch-contact member which is :independent of the action of the actuating' member, a springfor snapping the switch-contact member in opposition tothe retracting-spring aforesaidkand means conrelease. the locking member from the movable switch-contact member on both the ad' vance and return movements of the actuating member. 'i i 3. In an electric switch, the combination with a movable switch-contact member and a spring for returning it to normal position, of a movable locking member for securing the switch-contact member, a pawl or dog carried by-the locking member, an actuating member adapted 'to movethe switch-contact member, and means movable with the actuating member adapted to idly move the pawl on ythe advance movement of the actuating member, and

to positively engage the pawl and deflect the.

locking member on the return movement'of lthe actuating member.

4. 1n anelectrie switch, the combination with a movable switchfcontact member and a 'spring for returning it to normal position, of fa pivoted` lever for locking the switch-contactl member, a pawl or dog carried by the lock.- ing member, an actuating member adapted to move the switch-contact member, and a cam carried by the actuating member adapted to idly engage the pa'wl o n the advance movement of the actuating member and to positively engage the pawl and deflect the locking-lever on the returnmovement of the actuating member.4

ln testimony W hereof I have signed my name to this specleation in presence of two Witn esses.

Y ISAAC Gr. WATERMAN. Witnesses:

GARDINER MERRITT, EDWARD SgPI'LLARD.' 

